<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="sass/2.css">
    <title>Document</title>
</head>
<body>
        <div id="abc" class="abc">
            <button @click="a+=1">切换显示状态</button>
            <button @click="age+=1" >增加年龄</button>
            <button @click="age-=1">减小年龄</button>
            <h2><span>第二张图片大于18可以看，目前年龄：</span>{{age}}</h2>
            <img src="image/01.jpg" alt="" v-if="a%2==0" >
            <img src="image/02.jpg" alt="" v-if="age>=18">
        </div>
</body>
<script src="https://unpkg.com/vue@next"></script>
<script>
    const Abc={
        data(){
            return{
                age:15,
                a:1
            }
        }
    }
    Vue.createApp(Abc).mount('#abc')
</script>
</html>